Duga, Norwin Dale F., Pauline Edrickke A. Imperial, Allan N Soriano, and Aileen D Nieva. 2016. “Packed Bed Biosorption of Lead and Copper Ions Using Sugarcane Bagasse”. ASEAN Journal of Chemical Engineering 16 (1), 23-37. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/8905.